------------[ cut here ]------------
WARNING: CPU: 1 PID: 7169 at net/kcm/kcmsock.c:631 kcm_write_msgs+0xf90/0x110c net/kcm/kcmsock.c:631
Modules linked in:
CPU: 1 UID: 0 PID: 7169 Comm: syz-executor.3 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : kcm_write_msgs+0xf90/0x110c net/kcm/kcmsock.c:631
lr : kcm_write_msgs+0xf90/0x110c net/kcm/kcmsock.c:631
sp : ffff80009d327560
x29: ffff80009d327700 x28: ffff0000d46a6b00 x27: dfff800000000000
x26: ffff0000dfa59568 x25: ffff0000dfa58f80 x24: ffff0000d566d850
x23: ffff0000dfa59230 x22: ffff0000c8652f00 x21: ffff0000d566d84c
x20: 0000000000000000 x19: 1fffe0001aacdb09 x18: 0000000000000000
x17: ffff0001fea8d8b0 x16: ffff80008afcaf48 x15: 000000000000000d
x14: 1ffff00013a64ec8 x13: 0000000000000000 x12: 0000000000000000
x11: ffff700013a64ed5 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000dd045b80 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 kcm_write_msgs+0xf90/0x110c net/kcm/kcmsock.c:631 (P)
 kcm_sendmsg+0x2074/0x25a0 net/kcm/kcmsock.c:907
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg net/socket.c:729 [inline]
 sock_write_iter+0x25c/0x378 net/socket.c:1179
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x540/0xa3c fs/read_write.c:686
 ksys_write+0x120/0x210 fs/read_write.c:738
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:746
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 774
hardirqs last  enabled at (773): [<ffff8000803da400>] __local_bh_enable_ip+0x1ec/0x35c kernel/softirq.c:412
hardirqs last disabled at (774): [<ffff80008b05ee64>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434
softirqs last  enabled at (772): [<ffff8000892e0188>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (772): [<ffff8000892e0188>] release_sock+0x14c/0x1ac net/core/sock.c:3735
softirqs last disabled at (770): [<ffff8000892e0070>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (770): [<ffff8000892e0070>] release_sock+0x34/0x1ac net/core/sock.c:3724
---[ end trace 0000000000000000 ]---
KCM: Hard failure on kcm_write_msgs